JP3506572B2 - Elastic yarn feeding method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic yarn feeding method in which an elastic yarn is unwound from a package and introduced into a yarn processing area in a state where a low tension is stably applied.

[0002]

2. Description of the Related Art There are roughly two methods for unwinding a yarn from a package. The first is an over-end unwinding in which the package is left stationary and the yarn is pulled out in the axial direction.
The second is a lateral unwinding in which the package is rotated about its axis and the yarn is drawn out perpendicularly to the axis and in the tangential direction of the package.

Usually, the former over-end unwinding is adopted for non-elastic yarns and the lateral unwinding is adopted for rubber-like elastic yarns. The reason why the over-end unwinding is not used for the unwinding of the elastic yarn is that the yarn is not unwound smoothly due to the unique properties of the elastic yarn, and the yarn stretches with a small tension. When the fineness variation and the elongation variation are introduced into the yarn supplied to the, and the elastic yarn having the variation is compounded with the non-elastic yarn by the yarn processing such as mixed fiber, mixed false twist, and Taslan,
This is because it causes problems such as stains on the product, scratches on the product, dragging, and peeling due to defective elastic yarn coating.

On the other hand, when the package is unwound in the lateral unwinding and provided with a friction drive device for rotating the package at a constant speed, the elastic yarn is unwound stably with a constant unwinding tension by a certain amount. On the other hand, on the other hand, it costs money to install the friction drive device, and because the package is rotating, the transfer tail is used to continuously supply the raw yarn for continuous processing. However, if the elastic yarn package becomes empty, the machine must be stopped, a new package must be supplied, the yarn must be hooked again, and processing must be restarted.

From the above, various methods have been studied in which the over-end unwinding is adopted for the elastic yarn and the yarn is fed to the yarn processing area under a stable tension, but a satisfactory method is still proposed. Absent.

For example, in the case of non-elastic yarn, a catching type compensator having a tension compensation function is used as an effective method for stabilizing the unwinding tension. If a compensator is provided between the package of non-elastic yarn and the supply roller, if the tension between the compensator and the supply roller increases according to the fluctuation of the unwinding tension from the package, the compensator will be caught by the tension. When the tension is low, the compensator becomes deeply bitten and tension is applied to the yarn, so that the yarn passes through the supply roller with a stable tension.

However, when such a compensator is used for the elastic yarn, it is easy to cause a large deformation by a small force peculiar to the elastic yarn. Therefore, if the tension between the compensator and the supply roller becomes high, , The elastic yarn is stretched and stretched between the compensator and the supply roller, and there is no effect of stabilizing the tension. Rather, when the compensator is provided, the tension fluctuation becomes large, which is effective with non-elastic yarn. Means for stabilizing the tension do not work for the elastic yarn.

Under these circumstances, it has been desired to develop a tension stabilizing means when the elastic yarn is unwound over the end.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for supplying a stable tension when an elastic yarn is unwound from a package and introduced into a yarn processing area, particularly with over-end unwinding. To provide.

[0010]

SUMMARY OF THE INVENTION According to the present invention, when an elastic yarn is unwound from a package and is introduced into a yarn processing area through a yarn feed roller and a feeding roller, a yarn package is provided between the yarn package and the feeding roller. A method for supplying an elastic yarn, characterized in that the provided elastic yarn is guided to a supply roller in a state where tension is applied to the unwound elastic yarn by means of a guide which is in intermittent contact with the yarn and rotates by the contact friction. .

[0011]

DETAILED DESCRIPTION OF THE INVENTION A detailed description will be given below with reference to the accompanying drawings of the present invention. FIG. 1 is a schematic view of a process for explaining an embodiment of the present invention. The elastic thread used in the present invention is a thread having rubber-like elasticity, and is a rubber thread, a polyurethane elastic thread or a block copolymerized polyether-ester elastic thread.

The elastic yarn 2 is unwound from the package 1, passes through the yarn guide 3, and is in tension with the unwound elastic yarn by the guide 4 which is in intermittent contact with the yarn and rotates due to the contact friction. Then, it is introduced into the yarn processing area 6 via the supply roller 5.

The elastic yarn 2 causes unwinding ballooning with the guide 3 when unwound from the package 1. This unwinding ballooning is a few m / mi like the actual twist covering process.
When unwinding n or less, the influence is relatively small, but when unwinding more than several + m / min, such as compound false twisting process, mixed fiber interlacing process, and compound Taslan process, large tension fluctuation occurs. . When the ballooning expands, the elastic yarn is pulled, and when the ballooning shrinks, the elastic yarn loosens. If this slackness is introduced into the yarn processing area 6 via the supply roller 5, the yarn processing becomes non-uniform, resulting in a poor covering property portion (so-called "stripping") that covers the elastic yarn with another yarn.

The rotating guide 4 is provided between the yarn guide 3 and the supply roller 5, and the elastic yarn 2 is produced by the above phenomenon.
It is installed in a place where the tension of the fluctuates significantly.

Since the rotating guide 4 is in intermittent contact with the yarn 2, its rotation speed does not change as it is in accordance with the fluctuation of the input tension, and the yarn 2 and the rotating guide 4 rotate. A slip occurs between them, and the rotation speed is maintained within an appropriate range, which acts to compensate the yarn tension. Since the rotating guide 4 freely rotates due to the contact friction with the yarn, the stabilized low level tension is applied to the yarn.

In the case of elastic yarns, the bite-type compensator as described above was completely useless, whereas the rotating guide of the present invention provides good control and low tension. it can.

Here, it is preferable that the guide 3 has a frictional force with the elastic yarn as small as possible, and it is preferable to use a satin chrome plating guide or a ceramic guide having rounded particles. The shape of the guide is preferably an annular shape, and a closed annular shape, an open annular shape, a tubular shape, a snail guide or the like is suitable.

At that time, the guide 4 which makes intermittent contact with the yarn and rotates due to the contact friction thereof has an average rotational peripheral velocity (V ').
_G ) is the rotational peripheral speed (V _R ) of the supply roller 5,
'It is preferable to rotate in relation to _G ≦ 0.95 V _R, more preferably _{0.65V R ≦ V' 0.55V R ≦} V G
≦ 0.85V _R. The reason why V _G ≦ 0.95 V _R is set here is to add tension to the elastic yarn, although it has low tension, and to prevent a blind defect.

[0019] V _'G> 0.95 V may yarn processing becomes uneven due to the influence of _R in loose tension, especially V' _G ≧ V _R
Then, the looseness enters the yarn processing area and the yarn processing becomes non-uniform, so that a peeling defect is likely to occur.

The higher the tension applied to the V _'G <0.55V elastic yarn in _R Conversely, tension also in this case is unstable so it involves stretching deformation.

The average rotational peripheral velocity (V 'of the rotating guide 4)
_G ) with respect to the rotational peripheral speed (V _R ) of the supply roller is 0.
55V _R ≦ V ′ _G ≦ 0.95V _R , which is low tension, but tension is applied, and the rotation peripheral speed (V _G ) of the rotating guide 4 is set to the average rotation peripheral speed (V ′ _G ). Around ±
0.12 V _{R (where, V 'G + 0.12V R <} V R) is varied in the range of, stabilizing the tension of the elastic yarn. V
_G is V _G > V ′ _G + 0.12V _R or V _G <V ′ _G −
It is difficult to stabilize the tension when the rotation speed is changed up to the range of 0.12V _R.

As described above, the rotational speed (V _G ) and the average rotational speed (V ′ _G ) of the rotating guide 4 are 0.55 V _R ≦ V ′ with respect to the rotational speed (V _R ) of the supply roller. _G ≤
In order to satisfy the relationship of 0.95V _R and V _G = V ′ _G ± 0.12V _R , use of the rotary guide 4 is as follows.

The rotating guide 4 has a length (L ₁ ) at a portion in contact with the yarn and a length (L ₂ ) at a portion not in contact with the yarn.
With the ratio of 1: 0.8 to 1: 2.5, the yarn is intermittently contacted with the yarn and rotated by the contact friction. If the ratio (L ₁ ) of the lengths of the contacting portions becomes too large, the rotation peripheral speed V _G of the guide 4 rotating with respect to the width of the change in the ballooning tension that occurs when the package 1 is unwound corresponds to the same. Since it is changed, it becomes difficult to stabilize the tension of the elastic yarn, and the effect of the present invention cannot be obtained with the rotary guide which is the part where all of the elastic yarn comes into contact. On the contrary, if the ratio of the lengths (L ₂ ) of the contacting portions becomes too small,
The friction between the elastic yarn and the rotating guide becomes too small to obtain the required rotational peripheral velocity, and excessive tension is applied to increase the tension fluctuation.

The ratio of L ₁ to L ₂ is 1: 0.8 to 1: 2.
In the case of No. 5, when the unwinding tension of the elastic yarn 2 from the package 1 becomes too high, the contact friction between the elastic yarn 2 and the rotating guide 4 becomes high, and the rotating guide 4 tries to rotate quickly. , L ₁ and L ₂ are in intermittent contact with each other, so that the yarn slips around the rotating guide 4,
The guide 4 rotates within a range satisfying V _G = V ′ _G ± 0.12V _R to reduce the tension fluctuation. On the other hand, when the unwinding tension becomes too low, the contact friction between the elastic yarn 2 and the rotating guide 4 becomes low, and the guide 4 tries to rotate slowly. The thread slips at the same time, and similarly the guide 4 causes V _G =
Rotates within a range satisfying V _'G ± 0.12V _R, attempts to reduce the tension variation.

As described above, the tension of the elastic yarn 2 is just before the supply roller 5 and the average tension is 7 × 10 ⁻³ g / de-5.
It is controlled in the range of 0 × 10 ⁻³ g / de, and 14 × 10 ⁻³ g / de to 38 unless it is a yarn with poor unwinding property.
It is controlled in the range of × 10 ^-3 g / de. When the average tension is less than 7 × 10 ⁻³ , looseness enters the yarn processing area due to fluctuations in tension and causes a so-called blind defect in which the elastic yarn is not covered with other yarn. On the other hand, when the average tension exceeds 50 × 10 ⁻³ g / de, the elastic yarn is stretched, and the fluctuation in tension causes a problem such as a change in fineness and a change in elongation of the elastic yarn.

Further, the rotating guide 4 will be described in detail with an example. In the guide illustrated in FIG. 2, a large number of yarn contact pieces 9 each having a yarn guide groove (a portion where the yarn contacts) 8 are arranged on the circumference between two discs 7 and 7 '. It is a thing. In addition to this, as shown in FIG.
As shown in FIG. 4 (b), a polygonal body having alternating and, and a contact piece 14 as shown in FIG. 4 (a) are concentrically arranged on a disc and mounted, and two of them are prepared. Face to face Figure 4
It is also possible to form the guide groove 16 in which the contact pieces 14 and 14 'are meshed with each other and the yarns come into contact with each other as shown in FIG. Figure 4
In (c), the contact pieces 14 and 14 'may be in contact with each other, or a space where the threads do not contact may be provided between them to be arranged alternately.

The material of the portion where the rotating guide makes intermittent contact is preferably one having a small frictional force with the elastic thread, such as a ceramic composed of rounded particles or flat particles, a metal satin-chrome plated, etc. preferable.

Diameter (D) and weight (W) of the rotating guide
For the purpose of stably applying a low tension to the elastic yarn, the diameter (D) is preferably 15 to 100 mm, more preferably 20 to 40 mm, as the diameter of the circle formed by connecting the portions in contact with the yarn. The weight (Wg) is 5 × 10 ^-2 De ≦ W ≦ 20 × 10 ^{-2 in} relation to the fineness (De denier) of the elastic yarn.
De is preferable, and further 8 × 10 ^-2 De ≦ W ≦ 15 × 10
^-2 De is more preferable.

It is preferable to use a bearing for the shaft of the rotating guide, rotate as lightly as possible, and change the rotation speed according to the contact friction of the yarn.

The contact length of the contact piece in which the yarn makes intermittent contact is 1
0.5 to 3 mm per piece is preferable, 0.8 to 1.3 m
m is more preferred.

The number of contact portions (contact pieces) may be selected from the range of 10 to 50 in relation to the diameter of the guide.
Usually, 20 to 40 are preferable.

The length of contact of the yarn with the rotating guide may be the entire circumference of the guide, but it is usually 1/4 to 1/2 for good running of the yarn.

The position where the rotating guide 4 is provided is most preferably provided immediately after the yarn guide 3 which is placed substantially in the center of the axis of the package as illustrated in FIG. 1 from the viewpoint of stably applying low tension. . If another yarn guide is placed after the yarn guide 3 to bend the yarn path,
It is preferable to stop the bending between the yarn guide 3 and the rotating guide 4 at a total of 90 degrees or less.

Next, a yarn processing area where the elastic yarn feeding method of the present invention is effectively used will be described. This method of supplying the elastic yarn is effective in the yarn processing of covering the elastic yarn as the core and the elastic yarn as the side yarn, and can be applied to the composite false twisting process, the composite Taslan process, the composite mixed fiber process and the like.

Among them, in the composite false twisting process, the momentary looseness of the elastic yarn appears outside the side yarns of the composite false twisted yarn due to the balance of the twist tension of the false twist, which is a so-called unfolding phenomenon. As a result, the application of the method of the present invention is effective as a solution.

A description will be given below by taking as an example a composite false twisting process using an elastic yarn as a core and a polyester filament as a side yarn.

In FIG. 5, the elastic yarn 2 is the package 1
The guide 4 which is unwound from the yarn, passes through the yarn guide 3 and is in intermittent contact with the yarn, and is rotated by the contact friction.
The unwound elastic yarn is introduced into the yarn processing area via the supply roller 5 with a low tension applied.

The elastic yarn 2 is pre-stretched between the rollers 18 so as to be in a tensioned state, and then drawn with a yarn 17 obtained by combining an unstretched yarn A and a semi-stretched yarn B which are thermoplastic non-elastic yarns. Alignment,
Entanglement is provided by passing through an interlace nozzle 19 provided between the roller 20 and the roller 20. Next, after simultaneously drawing false twisting, heat setting and untwisting between the heater 21 and the false twisting tool 22 provided between the roller 20 and the roller 23, the winder 24
To obtain a bulky elastic processed yarn.

Another example of the composite false twisting process will be described with reference to FIG. The elastic yarn 2 is unwound in the same manner as in FIG. 5, and is pre-stretched between the roller 5 and the large-diameter portion of the stepped roller 26 to be in a tensioned state, and then the unstretched yarn A of the thermoplastic non-elastic yarn A is drawn.
And the semi-stretched yarn B are aligned with the combined yarn 25 and wound around the large diameter portion of the stepped roller 26 four times via the separate roller 27, while the separate roller 27 is attached to the small diameter portion of the stepped roller 26. Through the interlacing nozzle 28, and the yarns are mixed and entangled by using the interlace nozzle 28 while the two yarns move from the large diameter portion to the small diameter portion.

Here, at least the small-diameter portion of the stepped roller is heated to the glass transition temperature of the thermoplastic inelastic yarn or higher, and the mixed and entangled yarn is rolled into the roller of the small-diameter portion of the stepped roller. After heating on the circumference of the false twist tool 31, heater 30
Using the heating end point of the heated stepped roller small-diameter portion as a starting point for twisting, false twisting, heat setting, and untwisting are performed, and the yarn is taken up by the take-up roller 32 and the bulky elastic processed yarn is wound on the pan 33. . If the pressing roller 29 is provided at the heating end point of the small diameter portion of the stepped roller to stop the retroactive twisting and fix the twisting start point, the processing becomes stable.

[0041]

【Example】

[Example 1] A block copolymerized polyetherester undrawn yarn monofilament (fineness 70 denier, elongation 800%) having polybutylene terephthalate as a hard segment and polyoxybutylene glycol as a soft segment is used as an elastic yarn, and Elastic yarn 2 in the process of 1
Is unwound from its package 1, and a low tension is applied to the unwound elastic yarn by a guide 4 which is in intermittent contact with the yarn and is rotated by the contact friction, and then a supply roller 5 is rotated at a speed of 90 m / min. Introduced into the yarn processing area.

At that time, as the rotating guide 4, FIG.
The shape shown in was used. The diameter of the guide (the diameter of the circle formed by connecting the points at which the yarn makes intermittent contact with the guide) is 25 mm, the material of the yarn contact piece 9 is ceramic, and the thickness at the contact portion with the yarn is 1 mm. As 32 on the circumference
I arranged the pieces. A bearing was provided on the rotating shaft of the rotating guide 4, and the weight was 8 g. Further, the length of the elastic yarn 2 in contact with the guide 4 was set to 1/4 of the circumferential length.

[0043] At that time, the average peripheral speed of the rotating guide 4 (V _'G) is V with respect to the rotational peripheral speed of the feed roller 5 (V _R)' is in the relationship of _G = 0.75 V _R, a time change in peripheral speed (V _G) has been controlled in the range of V _'G ± 0.12V _R.

As a result, the tension of the elastic yarn immediately before the supply roller (5) was 1.5 g (21 × 10 ⁻³ g / d) in average tension.
e), the fluctuation range of tension is 0.7 g (10 × 10 ⁻³ g / d)
With e), a low tension can be stably added and supplied to the yarn processing area, and when the composite false twist processing is performed in the yarn processing area, a bulky elastic yarn having no scoring defects is obtained.

[Comparative Example 1] The same elastic yarn as in Example 1 was used, and the guide 4 rotating in the process of FIG. Introduced into the processing area.

[0046] At that time, a V _'G = 0.52V _R, V
Greatly vary from _G = V _'G ± 0.45, resulting, tension of the elastic yarn immediately before the supply roller (5) is the average 55
× 10 ^-3 g / de, the fluctuation range of tension is 32 × 10 ^-3 g / d
Thus, the tension level and the fluctuation range became excessive. When introduced into the yarn processing area and processed in the same manner as in Example 1,
As shown in FIG. 7 (b), the elastic yarn was a bulky elastic yarn in which the scoring defects that were out of the side yarns were mixed.

Example 2 As the elastic yarn, a block copolymerized polyetherester undrawn monofilament (fineness 70 denier, elongation 800%) having polybutylene terephthalate as a hard segment and polyoxybutylene glycol as a soft segment is used. Using the process shown in FIG. 1, the elastic yarn 2 is unwound from the package 1 (winding diameter 20 cm, winding width 5 cm) through the guide 3 (metal guide with satin chrome plating, hole diameter 2 mm), and the yarn and the intermittent By the guide 4 that comes into contact and rotates due to the contact friction,
After applying a low tension to the unwound elastic yarn, the speed is 90m /
It was introduced into the yarn processing area by the supply roller 5 rotating at min.

At this time, as the rotating guide 4, as shown in FIG.
The shape shown in was used. The diameter of the guide (the diameter of the circle formed by connecting the points at which the yarn makes intermittent contact with the guide) is 25 mm, the material of the yarn contact piece 9 is ceramic, and the thickness at the contact portion with the yarn is 1 mm. As 32 on the circumference
I arranged the pieces. A bearing was provided on the rotating shaft of the rotating guide 4, and the weight was 8 g. Further, the length of the elastic yarn 2 in contact with the guide 4 was set to 1/4 of the circumferential length.

At that time, the average rotational peripheral velocity (V ′ _G ) of the rotating guide 4 has a relation of V ′ _G = 0.75V _R with respect to the rotational peripheral velocity (V _R ) of the supply roller 5, so that it can be changed with time. change in peripheral speed (V _G) has been controlled in the range of V _'G ± 0.12V _R.

As a result, the tension of the elastic yarn immediately before the supply roller (5) was 1.5 g (21 × 10 ⁻³ g / d) as an average tension.
e), the fluctuation range of tension is 0.7 g (10 × 10 ⁻³ g / d)
With e), a low tension can be stably added and supplied to the yarn processing area, and when the composite false twist processing is performed in the yarn processing area, a bulky elastic yarn having no scoring defects is obtained.

[Example 3] As an elastic yarn, the breaking elongation was 8
00% of block copolymerized polyetherester unstretched monofilament (70 denier) having polybutylene terephthalate as a hard segment and polyoxybutylene glycol as a soft segment is used, and as a thermoplastic inelastic yarn, the breaking elongation is 135%. Polyester multifilament semi-drawn yarn (115 denier / 10 filament) and polyester multifilament undrawn yarn (150 denier / 48) having a breaking elongation of 330%.
The filament was used for processing in the process of FIG.

The elastic thread 2 is moved by the rotating guide 4.
In the same manner as in Example 1, the material was introduced into the yarn processing area by the supply roller 5.

After the elastic yarn 2 is stretched four times by the roller 5 and the roller 18, the elastic yarn 2 is aligned with the two types of polyester multifilaments on the upstream side of the roller 18 and passed through an interlace nozzle 19 provided between the roller 20 and the polyester multifilament. Pneumatic pressure 4k
g / cm ^2, an overfeed rate of 2.5% to about 60 defects /
The confounding of m was given. Next, simultaneous drawing false twisting, heat setting, and untwisting are performed between the heating plate 21 and the false twisting disk 22 provided between the roller 20 and the stretching roller 23, and then rolled up by the winder 24 to be bulky. An elastic thread was obtained. At this time, the draw ratio is 1.6 times, the temperature of the heating plate is 160 ° C., the peripheral speed of the false twisting disc is 600 m / min, and the drawing roller speed is 300 m.
/ Min.

This bulky elastic yarn is subjected to S twist of 150 t / m and woven into a plain weave at a density of 100 warps / inch and weft 60 threads / inch, and then scouring, presetting, dyeing and final setting according to a conventional method. Was done. The resulting woven fabric had a soft, spun-like texture and appearance, and exhibited good stretchability. In addition, as a result of observing the appearance of the woven fabric when stretched by 30% in each of the warp and weft directions,
No bleeding was observed.

[Embodiment 4] The elastic yarn has a breaking elongation of 6
A block copolymerized polyetherester unstretched monofilament (20 denier) having a hard segment of polybutylene terephthalate of 00% and a soft segment of polyoxybutylene glycol is used, and as a thermoplastic non-elastic yarn, the breaking elongation is 135%. The polyester multifilament semi-stretched yarn (50 denier / 10 filament) and the polyester multifilament unstretched yarn (50 denier / 24 filament) having a cutting elongation of 330% were processed in the process of FIG.

The elastic thread 2 is moved by the rotating guide 4.
In the same manner as in Example 1, the material was introduced into the yarn processing area by the supply roller 5.

The elastic yarn 2 introduced by the roller 5 is
Large diameter part of roller 5 and stepped roller 26 (diameter 91.8 m
m) is drawn 2.0 times, and the elastic yarn in a tensioned state and the above-mentioned two types of polyester multifilament yarns are combined to form a combined yarn in a large diameter portion of the stepped roller 26. 120 ° C while winding 4 times with a separate roller
Small diameter part of stepped roller (90.0mm diameter)
To be wound 4 times by passing through a separate roller, and at that time, while both yarns are moving from the large diameter portion to the small diameter portion, those yarns are used with an interlace nozzle to have an overfeed rate of 2% and a pneumatic pressure of 2 kg. / Cm ² mixed fibers / entanglement (entanglement number 74
Pieces / m), and subsequently, after heating on the circumference of the small diameter portion of the heated stepped roller, the friction false twisting device 31 (surface velocity of friction disc / yarn velocity =
1.9), hot plate heater 30 (length 20 cm, temperature 20
(0 ° C) is used to perform false twisting, heat setting, and untwisting with the heating end point of the heated stepped roller small diameter portion as the twisting start point.
The yarn was taken up by the take-up roller 32 at a speed of 00 m / min, and the bulky elastic yarn was taken up as a bun by the take-up device 33.

When the obtained bulky elastic yarn was evaluated in the same manner as in Example 3, it was found to have a high quality level with no blinding defects.

[0059]

According to the present invention, when the elastic yarn is unwound from the package and is introduced into the yarn processing area, the low tension can be stably added and the yarn can be fed by the over-end unwinding. .

[Brief description of drawings]

FIG. 1 is a schematic view of a process for explaining an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a rotating guide.

FIG. 3 is a diagram showing another example of a rotating guide.

FIG. 4 is a diagram showing another example of a rotating guide,
(A) shows the contact piece, (b) shows the disk mounted concentrically on the disc, and (c) shows the contact piece meshed with each other to form a guide groove for the yarn to contact. Is.

FIG. 5 is a diagram showing an example of a process in which the yarn processing area is a composite false twisting process.

FIG. 6 is a diagram showing another example of a process in which the yarn processing area is a composite false twisting process.

FIG. 7 is a cross-sectional view of a bulky elastic yarn in which the elastic yarn is covered with the elastic yarn as the core yarn and the non-elastic yarn as the side yarn.
(B) is a defective yarn (so-called peeled yarn).

[Explanation of symbols]

1 ... Elastic yarn package 2 ... Elastic thread 3 ... Yarn guide 4 ... Rotating guide 5: Supply roller 6 ... Thread processing area 7, 7 '... disk 8: Thread guide groove (contact part) 9: Thread contact piece 10: Space (thread non-contact part) 11 ... Rotation axis 12: Thread contact part 13: Thread non-contact part 14, 14 '... Contact piece 15, 15 '... Mounting surface of contact piece to disk 16 ... Threading part 17 ... Thermoplastic inelastic yarn 18, 20, 23 ... Laura 19 ... Interlaced nozzle 21 ... Heater 22 ... False twist 24 ... Winder 25 ... Thermoplastic inelastic yarn 26. Stepped roller 27 ... Separate roller 28 ... Interlaced nozzle 29 ...... Presser roller 30 ... Heater 31 ... False twisting tool 32: take-up roller 33 ... Winding device 34 ... Elastic thread 35, 36 ... Inelastic thread A, B ... Thermoplastic inelastic yarn

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-47-16752 (JP, A) JP-A-6-316826 (JP, A) JP-A-6-10226 (JP, A) JP-A-8- 120533 (JP, A) JP-B 49-40017 (JP, B1) JP-B 45-27304 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) D02G 1/00-3 / 48 D02J 1/00-13/00

Claims (8)

(57) [Claims] 1. When an elastic yarn is unwound from a package and introduced into a yarn processing area through a yarn guide and a supply roller, the elastic yarn is provided between the yarn package and the supply roller.
A method for supplying an elastic yarn, characterized in that the unwound elastic yarn is guided to a supply roller in a state where tension is applied to the unwound elastic yarn by means of a guide which makes intermittent contact with the yarn and rotates due to the contact friction. 2. The elasticity according to claim 1, wherein the guide which is intermittently brought into contact with the yarn and rotates by the contact friction is provided immediately after the yarn guide through which the elastic yarn is unwound from the yarn package and firstly passes. Thread feeding method. 3. The average rotational peripheral velocity (V ′ _G ) of the guide which is intermittently contacted with the yarn and rotates due to the contact friction is 0.55 V _R ≦ V with respect to the rotational peripheral velocity (V _R ) of the supply roller. ′
_G ≦ 0.95 V _R claims 1 or 2 yarn feeding method of the elastic yarn according the relationship of. 4. A yarn and intermittent contact with the rotational peripheral speed of the guide which is rotated by the contact friction (V _G) is '± around _(G 0.12 V _R (where V average peripheral speed V)' _G +0.
The method for supplying an elastic yarn according to claim 1, wherein the tension of the elastic yarn is stabilized by changing within a range of 12V _R <V _R ). 5. The ratio of the length of the portion of the guide which is in contact with the yarn and which is rotated by the contact friction to the length of the portion which is not in contact with the yarn is 1: 0.8 to 1: 2.5. The method for supplying elastic yarn according to claim 1, 2, 3 or 4, which is within the range. 6. elastic yarn according to claim 1, 2, 3, 4 or 5, wherein the tension is the average tension ^{7 × 10 -3 g / de~50 ×} 10 -3 g / de immediately before the feed roller Elastic yarn feeding method. 7. An elastic yarn, the yarn processing area of which is in a tension state,
2. The method for feeding an elastic yarn according to claim 1, wherein the processing region is a false twisting, heat setting and untwisting process after simultaneously mixing and entanglement with at least two or more thermoplastic synthetic fibers having a difference in elongation. 8. An elastic thread, the thread processing area of which is in a tension state,
After at least two kinds of thermoplastic synthetic fibers having different elongations are mixed and entangled at the same time, the mixed and entangled yarns are heated in a non-twisted state on the periphery of a heated false twisting area supply roller. 2. The method for feeding an elastic yarn according to claim 1, wherein after the heating, the heating end point is a twisting start point, which is a processing area for false twisting, heat setting, and untwisting.